When we think of wearables, the first things that come to mind are smartwatches and smart rings. But wearables weren’t invented in the 21st century. Humans have long attached weird little gadgets to their bodies. And, believe it or not, some of the strangest were developed 100 years ago. Granted, these inventions may not seem so outlandish to us here in the year 2026. But if you put yourself in the shoes of someone living in the 1920s, you can imagine how odd many of these gadgets would appear. A century ago, broadcast radio was just becoming mainstream . The first transatlantic flights were taking off. The decade was one of unlimited possibilities—and it ended with the stock market crash of 1929 and the start of the Great Depression. But in the 1920s, the impossible often seemed possible. The Isolator helmet The Isolator helmet, envisioned by Hugo Gernsback for the July 1925 edition of Science and Invention magazine.…